Use Embree with AMD Threadripper?

V-Ray V-Ray for Maya General
1

Hi,

we have a brand new render node with the AMD Threadripper 1950X for rendering Maya (2018.1) / VRay stuff (v 3.6) under Windows 10.

During test batch rendering the render exit after some frames. We thought that there was a hardware failure, but after disabling the “Use Embree” option, the VRay renders without problems.

Is this a known problem/behavior? Can’t believe as I read that the Threadripper supports Embree as well?

Thanks for any enlightenment,
Lars

2

We are not aware of the problem and it might be related to something else… We have a Threadripper and a Ryzen machine here and we render on them all the time without issues. It would be best if you can get us a crash dump or a scene to support@chaosgroup.com

Embree works fine on AMD processors; we compile it with generic SSE instructions that are not specific to Intel CPUs.

Best regards,
Vlado

3

A bit off topic, but is there any differences in the image between AMD and Intel? I know there used to be, but Im not sure if that is long gone? Can you render an animation on a mixed Intel and AMD farm? Or use Intel and AMD slaves when DR-rendering?

4

I’ve not noticed any issues myself and nobody’s complained so far - that’s all the info we have.

Best regards,
Vlado

5

Thanks Vlado. We will check if again if the option makes any difference.

And no, as far as we can tell, there is not difference between Intel and AMD - the images looks exactly the same. At least that is our observation after the first week.

6

Alright! Great to hear.

Cheers

7

Just a quick update: The computer has a hardware failure and must be replaced. So, VRay is innocent.